Hi everyone. I have had the same problem on my Ubuntu installation and have after a few days of searching down wrong tracks found the solution.

The problem is, at least in Ubuntu, that authlib support is absent in the courier-maildrop package. Once I found out that this was my problem, I was able to get it to work by removing the courier-maildrop package and instead install the standalone maildrop package:

Code:

sudo apt-get remove courier-maildrop
sudo apt-get install maildrop

I don't know where else I need to post this solution, someone please direct me. I am a newbee to this site.

problem in master.cf in postfix, with arguments who send pipe to maildrop and .mailfilter don't know this argument.
known torouble as "user unknown. Command output: /usr/local/bin/maildrop: Invalid user specified."
I use next configuration master.cf

What is strange, that "to=" parameter isn't specified (log is unedited).

maildrop -d [email protected]_domain.com
shows "Invalid user specified"
while I'm sure there is such user within mysql DB of IspConfig
Does the maildrop use some cache or something or should it use straight from mysql? Because I don't see any queries to DB.

problem in master.cf in postfix, with arguments who send pipe to maildrop and .mailfilter don't know this argument.
known torouble as "user unknown. Command output: /usr/local/bin/maildrop: Invalid user specified."
I use next configuration master.cf

maildrop -d [email protected]_domain.com
shows "Invalid user specified"
while I'm sure there is such user within mysql DB of IspConfig
Does the maildrop use some cache or something or should it use straight from mysql? Because I don't see any queries to DB.

Click to expand...

But I can see my e-mail user in the MySQL ispconfigdb mail_user table!!!???

Your system seems to work properly. You will just have to change the mailscan option for the email account and domain to not rejecet bad headers.

Click to expand...

What did you mean exactly?
This user already has no spamfilter applied, and no other rules of any kind applied.
Exactly how do I tell ISPConfig to accept bad headers, and if I do, aren't I defeating spam filtering and Clam Antivirus?

Hi everyone. I have had the same problem on my Ubuntu installation and have after a few days of searching down wrong tracks found the solution.

The problem is, at least in Ubuntu, that authlib support is absent in the courier-maildrop package. Once I found out that this was my problem, I was able to get it to work by removing the courier-maildrop package and instead install the standalone maildrop package:

Code:

sudo apt-get remove courier-maildrop
sudo apt-get install maildrop

I don't know where else I need to post this solution, someone please direct me. I am a newbee to this site.

Hey gemini, I got it working on Ubuntu Intrepid Ibex. Is there any particular reason you're using ordinary Debian instead?
Ubuntu is built on debian.

Click to expand...

Well, I've choosed debian because it's more recommended as server distribution while ubuntu is recommended more as desktop (I'm not very advanced linux user, so I relied on others opinions).
Currently I'd rather avoid changing OS, since I've already moved everything on new server, dropped old one, and reinstall of server would mean downtime of websites as well as a lot of work. Everything works perfectly, except mail.

P.S. I can't find any maildrop mysql related config.
Is there any way to test mysql/support/connection with maildrop? I can't find such option ;/